package Example02;

  class Student{
        String name;
        int age;
        void read(){
            System.out.println("大家好,我是"+name+",年龄"+age);
 }
}
public class Example02 {
      public static void main (String[] args){
          Student stu1 =new Student();
          Student stu2 =null;
          stu2=stu1;
          stu1.name="小明";
          stu1.age=20;
          stu2.age=50;
          stu1.read();
          stu2.read();
      }
}
